Tony Hawk's Pro Skater 3

Master code:
Enter the options menu, then select "Cheats". Enter backdoor (case-sensitive) to unlock all cheat options. The sound of money being collected will confirm correct code entry. Press Start to pause game play in career or free skate mode to access the cheat menu. Press X to toggle the options. Note: This does not unlock the hidden characters and bonus levels.

All FMV sequences:
Enter the options menu, then select "Cheats". Enter Peepshow (case-sensitive) to unlock all FMV sequences. The sound of money being collected will confirm correct code entry.

All Levels (Including 3 from THPS):
Go to options, then go to cheats, and enter "roadtrip" (case-sensitive). Whatever skater u have, his level goals will all be done and hell have every stat point.

Grand Theft Auto 3

Tank:
Press Circle(6), R1, L2, L1, Triangle, Circle, Triangle during game play. A message will confirm correct code entry. The tank will appear in front of you. This may be repeated as many times as needed.

Dodo car:
Press Right, R2, Circle, R1, L2, Down, L1, R1 during game play. A message will confirm correct code entry.


No wanted level:
Press R2(2), L1, R2, Up, Down, Up, Down, Up, Down during game play. A message will confirm correct code entry. Note: Saving the game will make the effects of this code permanent.

Higher wanted level:
Press R2(2), L1, R2, Left, Right, Left, Right, Left during game play. A message will confirm correct code entry. Note: Saving the game will make the effects of this code permanent.

All weapons:
Press R2(2), L1, R2, Left, Down, Right, Up, Left, Down, Right, Up during game play. A message will confirm correct code entry. Repeat this code for more ammunition.

Full health:
Press R2(2), L1, R1, Left, Down, Right, Up, Left, Down, Right, Up during game play. A message will confirm correct code entry.

Full armor:
Press R2(2), L1, L2, Left, Down, Right, Up, Left, Down, Right, Up during game play. A message will confirm correct code entry.